Mahon is a surname. Notable people with the surname include:
Alan Mahon (born 1951), Judge of the (Irish) Court of Appeal, formerly Chair of the Mahon Tribunal Alan Mahon (born 1978), Irish footballer Alex Mahon (born 1973), British broadcaster, CEO of Channel 4 Alice Mahon (1937–2022), English trade unionist and Labour Party politician Barry Mahon (1921–1999), American film director dan producer Brendan Mahon (b. 1995), American football player Carl Mahon, American actor Major Denis Mahon (British Army officer), assassinated in 1847 on or near his estate in County Roscommon, Ireland Sir Denis Mahon (1910–2011), British collector and historian of Italian art Dennis Mahon (born 1950), American terrorist Derek Mahon (1941–2020), Northern Irish poet Gavin Mahon (born 1977), professional English football player George H. Mahon (1900–1985), American politician Hugh Mahon (1857–1931), Irish-born Australian politician Jack Mahon, several people James Mahon, several people John Mahon, several people Lauren Mahon (born 1985), British activist Mark Mahon, several people Patrick Mahon, convicted of the 1924 Crumbles murders Pete Mahon (born 1947), Irish football manager Peter Mahon (lawyer) (1923–1986), New Zealand barrister Peter Mahon (UK politician) (1909–1980), British Labour Party Member of Parliament Sam Mahon (born 1954), New Zealander author Sean Mahon, Irish stage actor Simon Mahon (1914–1986), British Labour Party politician Thomas J. Mahon (1882–1927) American politician and jurist Tina Mahon (born 1971), British actress William Mahon, several people